“Plastic products labeled as “BPA free” may not be as safe as we thought. A recent investigation tested the impact of a popular BPA substitute on zebra fish embryos. This research adds to a handful of studies questioning the safety of “BPA free” replacements. The findings are disturbing. Long-term animal studies linked BPA Bisphenol A, a known endocrine disruptor, to issues with brain and reproductive development, early onset of puberty, and increased instances of breast and prostate cancer. As a result, many manufacturers phased out the use of this chemical in hardening plastics, opting for “BPA free” substitutes. The most frequently used alternative is BPS Bisphenol S.
This study subjected zebrafish to minor amounts of both BPA and BPS, examining the impact of these chemicals on genes and brain cells associated with reproduction. Zebrafish serve as a useful model for studying the effects of plastic additives because their clear embryos enable scientists to observe and track cell growth. The research revealed that low concentrations of BPS influenced the embryo much like BPA. Exposure to either BPA or BPS led to an accelerated embryonic development and BPA triggered early birth.
The research also established that both BPA and BPS interact with the thyroid hormone system. Given the crucial role of thyroid hormone in brain development during gestation, these findings are significant for understanding both general embryonic and fetal development, and their potential impact on humans. In 2012, the FDA banned the use of BPA in all baby bottles, sippy cups, and baby formula packaging as manufacturers shifted to presumed safer alternatives. The agency maintains its commitment to extensive studies to resolve essential queries and explain uncertainties regarding BPA, in partnership with the National Toxicology Program. The FDA’s new analysis reviewed over 300 studies published from November 2009 to July 2013.
The Breast Cancer Fund advises those wishing to minimize potential pollutants from BPA, BPS and other alternatives to choose glass, stainless steel, and food-safe ceramic containers for storing food and water. They strongly advocate against microwaving in plastic.
Comparison of BPA and BPS Effects on Zebrafish Embryos
| Chemical | Effects on Zebrafish Embryos |
|---|---|
| BPA | Accelerated development, early birth |
| BPS | Similar effects to BPA |
Steps to Minimize Exposure to BPA and BPS
- Choose glass, stainless steel or food-safe ceramic containers.
- Avoid microwaving in plastic.
Important Regulatory Measures by FDA
- Banning of BPA in all baby bottles, sippy cups, and baby formula packaging in 2012.
- Ongoing in-depth studies to address uncertainties about BPA.